Wow,
I envy you. How does it handle itself. I asked an A-bike owner here in Sweden to tell the difference between keeping balance on a standard bike and an A-bike and he said that a-bike has a bit different handling. not so much different, one learn it quickly.
I have only tested two different kick-bikes with two wheels.
one named x-104 and I didn't like how that one handled itself. I felt a bit insecure using it. Too easy to get out of course and into heavy traffic or turning into other side walk users. I also tested a kids kick-bike which was too small for me and I was doing wheelies all the time on that one. Very easy to fall backward.
How does this one feel from this point of view?
And regarding the speed and what muscle power it take to maintaine it.
I have three different four-wheel kickbikes for winter usage. They all are very different in how they handle themselves. The best one is magnitudes better than the other two. the worst is very insecure to use if you have to use only one hand and use the other hand to take out your mobile phone to answer a call. It easily start to wobble if you use only one hand.
But if we talk muscle power. The very heavy kickbikes take maybe two times the energy to go same speed as my MicroBike or my SmartBike folders. If I go some 500 meters on the pedal powered bikes then my heart beat is still in the low level while if I keep that speed on the four wheel kickbikes then I have to shift foot and kick a lot and my heart beat gets up and my breath start to change and I start to sweat. So it takes much more effort.
Could you compare if you would only push a similar kick bike only stamping the ground and never the lever behind you would stamping the ground take more effort then doing the lever pumping?
What would it feel like if the method to move was like a Crosstrainer?
See my picture below
To stamp on the ground with the foot is not an ideal way to move forward. in winter when it is snow and ice the foot easily slip and at summer the very stamp hit the knee much harder than to pedal a bike. To take slopes is more difficult too. When you pedal you take turns left right left right while if you kick it is left left left change foot and right kick right kick right kick change foot.
I've tested to sit on the microbike and pretend it to have no pedals on it. And then take turns having my feet on the ground and pushing left right left right and that is much harder than to pedal at same speed and it hurt my manly parts too. One need a very comfort saddle to do such things
So pedals is a good invention. Gears even better. Your new toy should have gears so you could pump at higher speed.
The band brake on my SmartBike is almost not there. Very bad brake. Hope yours is better.
Here another picture showing how it works out.